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<div class="headertitle"><div class="title">engine_multiscale_scratchpad.h File Reference</div></div>
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<p>Scratchpad implementation for the MultiscalePartitioningEngineView.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &quot;<a class="el" href="engine__multiscale_8h.html">gridfire/engine/views/engine_multiscale.h</a>&quot;</code><br />
<code>#include &quot;<a class="el" href="scratchpad__abstract_8h.html">gridfire/engine/scratchpads/scratchpad_abstract.h</a>&quot;</code><br />
<code>#include &quot;<a class="el" href="engine_2scratchpads_2types_8h.html">gridfire/engine/scratchpads/types.h</a>&quot;</code><br />
<code>#include &quot;fourdst/atomic/atomicSpecies.h&quot;</code><br />
<code>#include &lt;vector&gt;</code><br />
<code>#include &lt;memory&gt;</code><br />
<code>#include &lt;unordered_map&gt;</code><br />
<code>#include &quot;sundials/sundials_context.h&quot;</code><br />
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Include dependency graph for engine_multiscale_scratchpad.h:</div>
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Classes</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html">gridfire::engine::scratch::MultiscalePartitioningEngineViewScratchPad</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Scratchpad for multiscale partitioning engine computations with QSE groups. <a href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html#details">More...</a><br /></td></tr>
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Namespaces</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">namespace &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="namespacegridfire.html">gridfire</a></td></tr>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">namespace &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="namespacegridfire_1_1engine.html">gridfire::engine</a></td></tr>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">namespace &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="namespacegridfire_1_1engine_1_1scratch.html">gridfire::engine::scratch</a></td></tr>
<tr class="memdesc:namespacegridfire_1_1engine_1_1scratch"><td class="mdescLeft">&#160;</td><td class="mdescRight">Scratchpad memory management for computational engines. <br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Scratchpad implementation for the MultiscalePartitioningEngineView. </p>
<p>This header defines the MultiscalePartitioningEngineViewScratchPad, a concrete implementation of AbstractScratchPad designed for use with multiscale partitioning algorithms. It provides thread-local storage for QSE (Quasi-Static Equilibrium) groups, solvers, species classifications, and SUNDIALS contexts required for solving stiff subsystems.</p>
<dl class="section user"><dt>Purpose</dt><dd>The MultiscalePartitioningEngineViewScratchPad stores:<ul>
<li>QSE groups representing clusters of species in quasi-static equilibrium</li>
<li>QSE solvers for each group (managed via unique_ptr)</li>
<li>Classification of species into dynamic vs. algebraic categories</li>
<li>A composition cache for efficient lookup of computed compositions</li>
<li>A SUNDIALS context for numerical solver operations</li>
</ul>
</dd></dl>
<dl class="section user"><dt>Examples</dt><dd><div class="fragment"><div class="line"><span class="preprocessor">#include &quot;<a class="code" href="engine__multiscale__scratchpad_8h.html">gridfire/engine/scratchpads/engine_multiscale_scratchpad.h</a>&quot;</span></div>
<div class="line"> </div>
<div class="line"><span class="comment">// Create and initialize the scratchpad</span></div>
<div class="line"><a class="code hl_struct" href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html">gridfire::engine::scratch::MultiscalePartitioningEngineViewScratchPad</a> scratch;</div>
<div class="line">scratch.<a class="code hl_function" href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html#a97f1fffc38872df3edd8c681685aa1fc">initialize</a>();</div>
<div class="line"> </div>
<div class="line"><span class="keywordflow">if</span> (scratch.<a class="code hl_function" href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html#ae61c7a93f9d4f8ded1e9c9dd2221d864">is_initialized</a>()) {</div>
<div class="line"> <span class="comment">// Add QSE groups and species classifications</span></div>
<div class="line"> scratch.<a class="code hl_variable" href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html#a38ea81d9d616cd0f74747e44948f4ab9">dynamic_species</a>.push_back(hydrogen);</div>
<div class="line"> scratch.<a class="code hl_variable" href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html#a38ea81d9d616cd0f74747e44948f4ab9">dynamic_species</a>.push_back(helium);</div>
<div class="line"> scratch.<a class="code hl_variable" href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html#a07552ac293e905112014c421ea15eb2f">algebraic_species</a>.push_back(carbon);</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Use the SUNDIALS context for solver operations</span></div>
<div class="line"> SUNContext ctx = scratch.<a class="code hl_variable" href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html#a735335d563bb612f19b531107c89fab6">sun_ctx</a>;</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="comment">// Clone for parallel execution (note: solvers not cloned)</span></div>
<div class="line"><span class="keyword">auto</span> worker_scratch = scratch.<a class="code hl_function" href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html#a7dbce2e9a2f940cbde8888aa67f5f3aa">clone</a>();</div>
<div class="line">worker_scratch-&gt;initialize(); <span class="comment">// Must re-initialize for new SUNContext</span></div>
<div class="ttc" id="aengine__multiscale__scratchpad_8h_html"><div class="ttname"><a href="engine__multiscale__scratchpad_8h.html">engine_multiscale_scratchpad.h</a></div><div class="ttdoc">Scratchpad implementation for the MultiscalePartitioningEngineView.</div></div>
<div class="ttc" id="astructgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad_html"><div class="ttname"><a href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html">gridfire::engine::scratch::MultiscalePartitioningEngineViewScratchPad</a></div><div class="ttdoc">Scratchpad for multiscale partitioning engine computations with QSE groups.</div><div class="ttdef"><b>Definition</b> engine_multiscale_scratchpad.h:90</div></div>
<div class="ttc" id="astructgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad_html_a07552ac293e905112014c421ea15eb2f"><div class="ttname"><a href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html#a07552ac293e905112014c421ea15eb2f">gridfire::engine::scratch::MultiscalePartitioningEngineViewScratchPad::algebraic_species</a></div><div class="ttdeci">std::vector&lt; Species &gt; algebraic_species</div><div class="ttdoc">Species that are solved algebraically (fast timescale/QSE).</div><div class="ttdef"><b>Definition</b> engine_multiscale_scratchpad.h:120</div></div>
<div class="ttc" id="astructgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad_html_a38ea81d9d616cd0f74747e44948f4ab9"><div class="ttname"><a href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html#a38ea81d9d616cd0f74747e44948f4ab9">gridfire::engine::scratch::MultiscalePartitioningEngineViewScratchPad::dynamic_species</a></div><div class="ttdeci">std::vector&lt; Species &gt; dynamic_species</div><div class="ttdoc">Species that evolve on the dynamic (slow) timescale.</div><div class="ttdef"><b>Definition</b> engine_multiscale_scratchpad.h:117</div></div>
<div class="ttc" id="astructgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad_html_a735335d563bb612f19b531107c89fab6"><div class="ttname"><a href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html#a735335d563bb612f19b531107c89fab6">gridfire::engine::scratch::MultiscalePartitioningEngineViewScratchPad::sun_ctx</a></div><div class="ttdeci">SUNContext sun_ctx</div><div class="ttdoc">SUNDIALS context for solver operations.</div><div class="ttdef"><b>Definition</b> engine_multiscale_scratchpad.h:127</div></div>
<div class="ttc" id="astructgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad_html_a7dbce2e9a2f940cbde8888aa67f5f3aa"><div class="ttname"><a href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html#a7dbce2e9a2f940cbde8888aa67f5f3aa">gridfire::engine::scratch::MultiscalePartitioningEngineViewScratchPad::clone</a></div><div class="ttdeci">std::unique_ptr&lt; AbstractScratchPad &gt; clone() const override</div><div class="ttdoc">Create a partial copy of this scratchpad.</div><div class="ttdef"><b>Definition</b> engine_multiscale_scratchpad.h:199</div></div>
<div class="ttc" id="astructgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad_html_a97f1fffc38872df3edd8c681685aa1fc"><div class="ttname"><a href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html#a97f1fffc38872df3edd8c681685aa1fc">gridfire::engine::scratch::MultiscalePartitioningEngineViewScratchPad::initialize</a></div><div class="ttdeci">void initialize()</div><div class="ttdoc">Initialize the scratchpad by creating a SUNDIALS context.</div><div class="ttdef"><b>Definition</b> engine_multiscale_scratchpad.h:153</div></div>
<div class="ttc" id="astructgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad_html_ae61c7a93f9d4f8ded1e9c9dd2221d864"><div class="ttname"><a href="structgridfire_1_1engine_1_1scratch_1_1_multiscale_partitioning_engine_view_scratch_pad.html#ae61c7a93f9d4f8ded1e9c9dd2221d864">gridfire::engine::scratch::MultiscalePartitioningEngineViewScratchPad::is_initialized</a></div><div class="ttdeci">bool is_initialized() const override</div><div class="ttdoc">Check whether the scratchpad has been initialized.</div><div class="ttdef"><b>Definition</b> engine_multiscale_scratchpad.h:133</div></div>
</div><!-- fragment --></dd></dl>
<dl class="section user"><dt>Thread Safety</dt><dd>This class is <b>not thread-safe</b>. Each thread must have its own instance because SUNDIALS contexts and QSE solvers maintain internal state. When cloning, the QSE solvers are not copied and the SUNContext is not cloned; the new instance must call initialize() to create its own context.</dd></dl>
<dl class="section see"><dt>See also</dt><dd>AbstractScratchPad </dd>
<dd>
MultiscalePartitioningEngineView </dd>
<dd>
SUNContext </dd></dl>
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